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| Features * On-chip OFDM Baseband Supports All the Transmission Modes of the IEEE 802.11a Specification and the OFDM Modes of the IEEE 802.11g Specification (6, 9, 12, 18, 24, 36, 48, and 54 Mbps) On-chip DSSS/CCK Baseband Supports All Transmission Modes of the IEEE 802.11b Specification (1, 2, 5.5, 11 Mbps) Single 20 MHz or 40 MHz Input Clock Generates the Internal System Clock and the 44 MHz Clock for the DSSS/CCK Baseband Low Pin Count Flexible MAC Layer Interface Flexible RF Interface Allows Glueless Communication with Various Dual Mode (802.11a/g) RF Devices On-chip Automatic Gain Control On-chip DC Offset Remove Mechanism Analog and Digital Gain Vector for the RF Transceiver SPI Interface for Configuration/Control 8 GPIO to Control External 11a/g PAs, On/Off of RF Devices and Antenna Diversity Digital or Analog Interface to the RF Devices Up to 4 Auxiliary Analog to Digital Converters (Depending On the Package) Up to 2 Auxiliary Purpose Digital to Analog Converters 1.8 Volt Core Voltage Supply 3.3 Volt I/O Voltage Supply 100-ball TFBGA Package * * * * * * * * * * * * * * * 802.11a/b/g Baseband Controller AT76C517 Summary 802.11a/b/g BaseBand Controller PLL Clock Reset Test Debug MAC I/F BaseBand 11a/b/g DAC DAC ADC ADC I Q I Q Register File DAC DAC Tx VGA Rx VGA Analog Front End ADC ADC GPIO Aux0 Aux1 NOTE: This is a summary document. The complete document is available under NDA. For more information, please contact your local Atmel sales office. 5642AS-WLAN-07/06 1. Description The AT76C517 provides complete modem functionality for an 802.11a/b/g wireless LAN chip set. It contains signal processing functionality for both DSSS/CCK and OFDM modulation/demodulation. It supports both short and long PLCP preamble formats for 802.11b rates, while it incorporates efficient compensation algorithms for improving the performance of the OFDM modem part. The AT76C517 provides an interface to a MAC processor consisting of a bi-directional data bus, data synchronization signals and a serial-to-parallel port interface. The AT76C517 can exchange either payload data or TX/RX vector and payload data with the MAC over a bi-directional data bus in a half-duplex fashion using data synchronization signals. The interface allows the baseband and the MAC controllers to operate at different speeds incorporating FIFOs in both directions. The serial-to-parallel port interface provides access to all internal registers and is able to run up to 20 MHz. The AT76C517 is able to interface with various 802.11a/g radio devices using analog or proprietary digital I/Q interface, analog or digital signals for automatic gain control, gain lock indication, antenna diversity control, LNA "gain on" and various other signals which depict the state of internal critical circuits related to the front-end logic of the modem. 2. Functional diagram MAC Interface Descrambler/ Header/Payload to MAC Preamble/ Header formation Scrambler Payload to MAC Descrambler Encoder Deinterleaver/ Viterbi decoder Equalizer/ Phase Compensator Scrambler Barker/CCK Demodulator CS/CCA Assessment OFDM/ CCK/ Barker Selector Interleaver CS/CCA Assessment Data mapper Barker/CCK Modulator I/Q Mismatch Compensator FFT/ CP Extraction LMS-DF Equalizer Derotator Transmit Filter Timing/ Frequency Sync Rough AGC I/Q mismatch Compensator Derotator IFFT/ CP insertion Timing/ Frequency Sync Receive Filter Fine AGC TransmitFilter/ Power Control Receive Filter Fine AGC Radio Interface 2 AT76C517 Summary 5642AS-WLAN-07/06 Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel: (49) 71-31-67-0 Fax: (49) 71-31-67-2340 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel: 1(719) 576-3300 Fax: 1(719) 540-1759 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel: (41) 26-426-5555 Fax: (41) 26-426-5500 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel: (33) 2-40-18-18-18 Fax: (33) 2-40-18-19-60 Biometrics/Imaging/Hi-Rel MPU/ High-Speed Converters/RF Datacom Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France Tel: (33) 4-76-58-30-00 Fax: (33) 4-76-58-34-80 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel: (852) 2721-9778 Fax: (852) 2722-1369 ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France Tel: (33) 4-42-53-60-00 Fax: (33) 4-42-53-60-01 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel: 1(719) 576-3300 Fax: 1(719) 540-1759 Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland Tel: (44) 1355-803-000 Fax: (44) 1355-242-743 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel: (81) 3-3523-3551 Fax: (81) 3-3523-7581 Literature Requests www.atmel.com/literature Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL'S TERMS AND CONDITIONS OF SALE LOCATED ON ATMEL'S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel's products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. (c) Atmel Corporation 2006. All rights reserved. Atmel(R), logo and combinations thereof, Everywhere You Are (R) and others are registered trademarks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. 5642AS-WLAN-06706 |
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